Use the Keywords field to store keywords that you want to associate with the reference. You can restrict a search to just the Keywords field, so the terms you enter into this field can be used to later retrieve the references when using EndNote’s Search command.
The Keywords term list (which maintains a list of terms used in the Keywords field) can be set up to recognize semicolons (;), slashes (/), backslashes (\), and returns as the delimiters that separate individual keywords. If you would prefer to use other punctuation to separate your keywords, you may change these settings using the Define Term Lists command from the Tools menu.